Table 1. Hydrogen-bond geometry (Å, °).

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—HW1⋯Cl1i	0.87	2.27	3.090 (2)	158
O1—HW2⋯Cl1ii	0.73	2.39	3.082 (2)	159
N1—H1A⋯Cl1	0.86	2.41	3.264 (4)	172
N1—H1B⋯Cl2	0.86	2.57	3.415 (4)	169
N1′—H1′1⋯Cl1iii	0.86	2.47	3.299 (10)	163
N1′—H1′2⋯Cl1i	0.86	2.58	3.386 (9)	156

Symmetry codes: (i) ; (ii) ; (iii) .